Vibration sensor

Abstract

The invention relates to a vibration sensor 1 for registration of vibrations in the vertical and horizontal point of the vibration sensor, where a movable part 9, comprising at least one magnet 7, is movably arranged in a holder 2, where the holder 2 comprises a in the upper part of the holder 2 arranged magnet 5 T and a in the bottom part of the holder 2 arranged magnet 5 B, where the movable part 9 is freely movable between the in the upper part of the holder 2 arranged magnet 5 T and the in the bottom part of the holder 2 arranged magnet 5 B, further the movable part 9 is enclosed/environed by at least one coil 6 in which the movable part 9, completely or partially, is freely movable.

1 . Vibration sensor ( 1 ) for registration of vibrations in the vertical and horizontal point of the vibration sensor ( 1 ), the sensor comprising:
 a movable part ( 9 ), comprising at least two magnets ( 7 ), are movably arranged in a holder ( 2 ), where the holder ( 2 ) comprises a in the upper part of the holder ( 2 ) arranged magnet ( 5 T) and a in the bottom part of the holder ( 2 ) arranged magnet ( 5 B) where the movable part ( 9 ) is freely movable between the in the upper part of the holder ( 2 ) arranged magnet ( 5 T) and the in the bottom part of the holder ( 2 ) arranged magnet ( 5 B), further the movable part ( 9 ) is enclosed/environed by at least one coil ( 6 ) in which the movable part ( 9 ), completely or partially, is freely movable, where the number of coils ( 6 ) are more than the number of magnets ( 7 ) which are arranged in the movable part ( 9 ).   
     
     
         2 . Vibration sensor ( 1 ) according to  claim 1 , wherein the magnets ( 7 ) in the movable part ( 9 ) are arranged to repel the in the bottom part of the holder ( 2 ) arranged magnet ( 5 B) and where the magnets ( 7 ) in the movable part ( 9 ) are arranged to attract the in the upper part of the holder ( 2 ) arranged magnet ( 5 T). 
     
     
         3 . Vibration sensor ( 1 ) according to  claim 1 , wherein the moveable part ( 9 ) is arranged so that the movable part ( 9 ) is in equilibrium/balance between the in the upper part of the holder ( 2 ) arranged magnet ( 5 T) and the in the bottom part of the holder ( 2 ) arranged magnet ( 5 B). 
     
     
         4 . Vibration sensor ( 1 ) according to  claim 1 , characterized in that the movable part ( 9 ) is arranged in a tube ( 4 ) with a around the movable part ( 9 ) surrounding air gap between the movable part ( 9 ) and the tube ( 4 ). 
     
     
         5 . Vibration sensor ( 1 ) according to  claim 4 , wherein the tube ( 4 ) is arranged with at least one slot ( 15 ). 
     
     
         6 . Vibration sensor ( 1 ) according to  claim 1 , wherein the coils ( 6 ) are separated by spacer rings ( 8 ) between the coils ( 6 ). 
     
     
         7 . Vibration sensor ( 1 ) according to  claim 1 , wherein an evaluation unit ( 11 ), a transmitter and receiver ( 12 ) and a battery ( 13 ) are arranged in the vibration sensor ( 1 ), where the transmitter and receiver( 12 ) are arranged for communication with other vibration sensors ( 1 ) and where the battery ( 13 ) provides the evaluation unit ( 11 ) and the transmitter and receiver ( 12 ) with electric energy. 
     
     
         8 . Vibration sensor ( 1 ) according to  claim 1 , wherein the vibration sensor ( 1 ) is arranged with a transformer coupling of a first coil ( 6 /Tr 1 ) and a second coil ( 6 /Tr 2 ) where the coils ( 6 ) are electric arranged to the first coil ( 6 /Tr 1 ) and where the first coil ( 6  Tr 1 ) is inductively connected to the second coil ( 6 /TY 2 ) and where the second coil ( 6 /Tr 2 ) inductively transmits signals to the evaluation unit ( 11 ) and transmitter and receiver ( 12 ).